| 基于数据段优先级分区重装策略 |
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| 引用本文： | 梁 平,刘云生. 基于数据段优先级分区重装策略[J]. 武汉科技大学学报, 2012, 35(3): 232-234 |
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| 作者姓名： | 梁 平 刘云生 |
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| 作者单位： | 华中科技大学计算机科学与技术学院;武汉科技大学计算机科学与技术学院 |
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| 基金项目： | 国家自然科学基金资助项目(60673128) |
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| 摘 要： | 提出一种基于数据段优先级分区重装策略PRS-DSP,其考虑数据特征及与之相关的事务特点,根据数据段优先级对数据库进行分区,并为每个分区设置相应重装频率,故障恢复时按照数据分区的重装频率来分区重装数据库,系统恢复服务后,根据新事务对数据的请求及数据分区重装频率来设置剩余分区的重装优先级。模拟实验结果表明,该分区重装策略降低了系统事务超截止期比率,其重装性能明显优于完全重装策略。
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| 关 键 词： | 嵌入式实时内存数据库 故障恢复 分区重装 数据段优先级 |
| 收稿时间： | 2011-07-19 |
A partition reload strategy based on data segment priority |
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| Liang Ping and Liu Yunsheng. A partition reload strategy based on data segment priority[J]. Journal of Wuhan University of Science and Technology, 2012, 35(3): 232-234 |
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| Authors: | Liang Ping and Liu Yunsheng |
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| Affiliation: | 1 (1.College of Computer Science and Technology,Huazhong University of Science and Technology, Wuhan 430074,China;2.College of Computer Science and Technology, Wuhan University of Science and Technology,Wuhan 430081,China) |
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| Abstract: | A partition reload strategy PRS-DSP(partition reload strategy based on data segment priority)based on the priority of data segment is presented,which partitions the database in accordance with the priorities of data segments and sets the corresponding reload frequency for each partition.It reloads the database in terms of partition reload frequency for crash recovery,which the system can serve before the entire database is reloaded.The reload priorities of the remaining partitions are set according to the requests of new transactions and reload frequency of partition after the system restores services.Simulation experiments show that,PRS-DSP reduces the system halt servicing time and improves the system availability during the recovery,demonstrating a better performance than the complete reload strategy. |
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| Keywords: | embedded real-time main memory database crash recovery partition reload data segment priority |
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